HELP?: screw peg repair and the marvel universe 3.75 scale

Hi, I've read through Mint Condition Customs' tutorial about peg repairs several times, and I just have a couple of questions with regards to how they apply to the 3.75 marvel universe scale. Unfortunately, he hasn't had time to get back to me.

I think my main questions are all about size. The drill and bur bits sizes to use in the drill or demel, and I guess then the screw size to replace the peg.

I have 2 spider-men my son has broke at the wrist and also I am looking at adding articulation to future figures.